src/unix/dir.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        unix/dir.cpp
   3 // Purpose:     wxDir implementation for Unix/POSIX systems
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     08.12.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "dir.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/intl.h"
  33     #include "wx/log.h"
  34 #endif // PCH
  35
  36 #include "wx/dir.h"
  37 #include "wx/filefn.h"          // for wxMatchWild
  38
  39 #include <sys/types.h>
  40
  41 #include <dirent.h>
  42
  43 // ----------------------------------------------------------------------------
  44 // macros
  45 // ----------------------------------------------------------------------------
  46
  47 #define M_DIR       ((wxDirData *)m_data)
  48
  49 // ----------------------------------------------------------------------------
  50 // private classes
  51 // ----------------------------------------------------------------------------
  52
  53 // this class stores everything we need to enumerate the files
  54 class wxDirData
  55 {
  56 public:
  57     wxDirData(const wxString& dirname);
  58     ~wxDirData();
  59
  60     bool IsOk() const { return m_dir != NULL; }
  61
  62     void SetFileSpec(const wxString& filespec) { m_filespec = filespec; }
  63     void SetFlags(int flags) { m_flags = flags; }
  64
  65     void Rewind() { rewinddir(m_dir); }
  66     bool Read(wxString *filename);
  67
  68     const wxString& GetName() const { return m_dirname; }
  69
  70 private:
  71     DIR     *m_dir;
  72
  73     wxString m_dirname;
  74     wxString m_filespec;
  75
  76     int      m_flags;
  77 };
  78
  79 // ============================================================================
  80 // implementation
  81 // ============================================================================
  82
  83 // ----------------------------------------------------------------------------
  84 // wxDirData
  85 // ----------------------------------------------------------------------------
  86
  87 #if !defined( __VMS__ ) || ( __VMS_VER >= 70000000 )
  88
  89 wxDirData::wxDirData(const wxString& dirname)
  90          : m_dirname(dirname)
  91 {
  92     m_dir = NULL;
  93
  94     // throw away the trailing slashes
  95     size_t n = m_dirname.length();
  96     wxCHECK_RET( n, _T("empty dir name in wxDir") );
  97
  98     while ( n > 0 && m_dirname[--n] == '/' )
  99         ;
 100
 101     m_dirname.Truncate(n + 1);
 102
 103     // do open the dir
 104     m_dir = opendir(m_dirname.fn_str());
 105 }
 106
 107 wxDirData::~wxDirData()
 108 {
 109     if ( m_dir )
 110     {
 111         if ( closedir(m_dir) != 0 )
 112         {
 113             wxLogLastError(_T("closedir"));
 114         }
 115     }
 116 }
 117
 118 bool wxDirData::Read(wxString *filename)
 119 {
 120     dirent *de = (dirent *)NULL;    // just to silent compiler warnings
 121     bool matches = FALSE;
 122
 123     while ( !matches )
 124     {
 125         de = readdir(m_dir);
 126         if ( !de )
 127             return FALSE;
 128
 129         // don't return "." and ".." unless asked for
 130         if ( de->d_name[0] == '.' &&
 131              ((de->d_name[1] == '.' && de->d_name[2] == '\0') ||
 132               (de->d_name[1] == '\0')) )
 133         {
 134             if ( !(m_flags & wxDIR_DOTDOT) )
 135                 continue;
 136         }
 137
 138         // check the type now
 139         if ( !(m_flags & wxDIR_FILES) &&
 140              !wxDir::Exists(m_dirname + _T('/') + de->d_name) )
 141         {
 142             // it's a file, but we don't want them
 143             continue;
 144         }
 145         else if ( !(m_flags & wxDIR_DIRS) &&
 146                   wxDir::Exists(m_dirname + _T('/') + de->d_name) )
 147         {
 148             // it's a dir, and we don't want it
 149             continue;
 150         }
 151
 152         // finally, check the name
 153         if ( !m_filespec )
 154         {
 155             matches = m_flags & wxDIR_HIDDEN ? TRUE : de->d_name[0] != '.';
 156         }
 157         else
 158         {
 159             // test against the pattern
 160             matches = wxMatchWild(m_filespec, de->d_name,
 161                                   !(m_flags & wxDIR_HIDDEN));
 162         }
 163     }
 164
 165     *filename = de->d_name;
 166
 167     return TRUE;
 168 }
 169
 170 #else // old VMS (TODO)
 171
 172 wxDirData::wxDirData(const wxString& WXUNUSED(dirname))
 173 {
 174     wxFAIL_MSG(_T("not implemented"));
 175 }
 176
 177 wxDirData::~wxDirData()
 178 {
 179 }
 180
 181 bool wxDirData::Read(wxString * WXUNUSED(filename))
 182 {
 183     return FALSE;
 184 }
 185
 186 #endif // not or new VMS/old VMS
 187
 188 // ----------------------------------------------------------------------------
 189 // wxDir helpers
 190 // ----------------------------------------------------------------------------
 191
 192 /* static */
 193 bool wxDir::Exists(const wxString& dir)
 194 {
 195     return wxPathExists(dir);
 196 }
 197
 198 // ----------------------------------------------------------------------------
 199 // wxDir construction/destruction
 200 // ----------------------------------------------------------------------------
 201
 202 wxDir::wxDir(const wxString& dirname)
 203 {
 204     m_data = NULL;
 205
 206     (void)Open(dirname);
 207 }
 208
 209 bool wxDir::Open(const wxString& dirname)
 210 {
 211     delete M_DIR;
 212     m_data = new wxDirData(dirname);
 213
 214     if ( !M_DIR->IsOk() )
 215     {
 216         wxLogSysError(_("Can not enumerate files in directory '%s'"),
 217                       dirname.c_str());
 218
 219         delete M_DIR;
 220         m_data = NULL;
 221
 222         return FALSE;
 223     }
 224
 225     return TRUE;
 226 }
 227
 228 bool wxDir::IsOpened() const
 229 {
 230     return m_data != NULL;
 231 }
 232
 233 wxString wxDir::GetName() const
 234 {
 235     wxString name;
 236     if ( m_data )
 237     {
 238         name = M_DIR->GetName();
 239         if ( !name.empty() && (name.Last() == _T('/')) )
 240         {
 241             // chop off the last (back)slash
 242             name.Truncate(name.length() - 1);
 243         }
 244     }
 245
 246     return name;
 247 }
 248
 249 wxDir::~wxDir()
 250 {
 251     delete M_DIR;
 252 }
 253
 254 // ----------------------------------------------------------------------------
 255 // wxDir enumerating
 256 // ----------------------------------------------------------------------------
 257
 258 bool wxDir::GetFirst(wxString *filename,
 259                      const wxString& filespec,
 260                      int flags) const
 261 {
 262     wxCHECK_MSG( IsOpened(), FALSE, _T("must wxDir::Open() first") );
 263
 264     M_DIR->Rewind();
 265
 266     M_DIR->SetFileSpec(filespec);
 267     M_DIR->SetFlags(flags);
 268
 269     return GetNext(filename);
 270 }
 271
 272 bool wxDir::GetNext(wxString *filename) const
 273 {
 274     wxCHECK_MSG( IsOpened(), FALSE, _T("must wxDir::Open() first") );
 275
 276     wxCHECK_MSG( filename, FALSE, _T("bad pointer in wxDir::GetNext()") );
 277
 278     return M_DIR->Read(filename);
 279 }